Another one here who skipped tummy time. Both of my kids hated it, especially my DD. She learned how to roll only to avoid laying on her tummy Her head was just fine, walked at 11mos, perfectly normal. She still doesn't like to lay on her tummy and she's five now!

DD2 hates it too so she taught herself to roll over at 2 weeks old!! I thought it was just a fluke, but every time we put her on her tummy she will roll herself over. She's 7 weeks old now and can almost go from back to belly. Crazy baby!!! And she was a late preemie...